.top {
    background: black;
    line-height: 40px;
    text-align: right;
    font-size: 20px;
}

.top a {
    color: white;
}

/*导航条*/
.nav {
    line-height: 40px;
}

/*左侧分享样式*/
.left {
    width: 20%;
    text-align: center;
    float: left;
}


/*左侧分享图片样式*/
.left img{
    width: 38px;
    height: 38px;
}

/*左侧文字*/
.left span {
    vertical-align: 50%;
}

/*中间正文*/
.center {
    width: 60%;
    float: left;
}

/*右侧广告图片*/
.right {
    width: 20%;
    float: left;
}

.footer {
    /*清除浮动效果*/
    clear: both;
    background: blue;
    text-align: center;
    line-height: 20px;

}
.footer a{
    color: white;
}



a {
    text-decoration: none;
    color: black;
}

a:hover {
    color: red;
}